EP2362100B1 - Agrégat de pompes de dosage et procédé de commande d'un agrégat de pompes de dosage - Google Patents

Agrégat de pompes de dosage et procédé de commande d'un agrégat de pompes de dosage Download PDF

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Publication number
EP2362100B1
EP2362100B1 EP10001643.5A EP10001643A EP2362100B1 EP 2362100 B1 EP2362100 B1 EP 2362100B1 EP 10001643 A EP10001643 A EP 10001643A EP 2362100 B1 EP2362100 B1 EP 2362100B1
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EP
European Patent Office
Prior art keywords
stroke
speed
metering pump
lifting speed
pump assembly
Prior art date
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Application number
EP10001643.5A
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German (de)
English (en)
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EP2362100A1 (fr
EP2362100B2 (fr
Inventor
Serge Gerz
Valeri Kechler
Markus Simon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Grundfos Management AS
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Grundfos Management AS
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Application filed by Grundfos Management AS filed Critical Grundfos Management AS
Priority to EP10001643.5A priority Critical patent/EP2362100B2/fr
Priority to PCT/EP2011/000722 priority patent/WO2011101119A1/fr
Priority to US13/579,719 priority patent/US10054117B2/en
Priority to JP2012553215A priority patent/JP5902101B2/ja
Priority to CN201180009714.3A priority patent/CN102762860B/zh
Publication of EP2362100A1 publication Critical patent/EP2362100A1/fr
Publication of EP2362100B1 publication Critical patent/EP2362100B1/fr
Publication of EP2362100B2 publication Critical patent/EP2362100B2/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0081—Special features systems, control, safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity

Definitions

  • the invention relates to a Dosierpumpenaggregat according to the preamble of claim 1 and a method for controlling such Dosierpumpenaggregates.
  • Known metering pump units have a metering space, which is bounded on one side by a displacement body, for example in the form of a membrane.
  • the displacer can change the volume of the metering chamber, whereby a pumping action is achieved.
  • a suitable linear drive is provided to drive the displacer .
  • this is a rotationally driving drive motor in the form of a stepping motor, which displaces a connecting rod in linear oscillating motion via an eccentric.
  • On the input and output side of the metering check valves are arranged, which prevent the suction medium to be conveyed from the pressure line back into the dosing and prevent the pressure stroke that the medium is pressed into the suction line instead of the pressure line.
  • WO 03 / 054392A1 discloses a metering pump, which has an electric motor drive, which is variably controllable in its speed and direction of rotation. By this control, it is possible to perform the suction stroke faster than the pressure stroke.
  • EP 1 278 961 B1 discloses a pump for conveying liquid, which is designed as a piston pump, wherein the piston can be moved so that during the pressure stroke, the speed increases towards the center of the pressure stroke and then reduced again at the end of the pressure stroke.
  • US 4,131,393 discloses a fluid pump system in which the suction stroke is started at a slower rate to avoid cavitation.
  • the metering pump unit has, in a known manner, a metering space on which a displacer body is arranged adjacent.
  • the displacer thus forms a wall of the dosing and can change the volume of the dosing by its movement.
  • the volume of the metering chamber increases and during a pressure stroke, the displacer is moved so that the volume of the metering chamber is reduced.
  • a displacement drive is provided which can be controlled or regulated by a control device.
  • the speed, operating time and direction of movement of the displacer drive can be predetermined via the control device in order to set or regulate the volume to be metered via the actuation of the displacer drive.
  • the positive displacement drive is preferably an electric drive motor, in particular a stepping motor, which can be controlled very precisely by stroke length and / or stroke speed of the displacement body to set specifically to comply with the amount to be dosed and the dosing according to predetermined values.
  • the drive motor may be a linear motor or a rotationally driving electric motor, wherein the rotational movement is then converted into a linear movement of the displacement body via suitable transmission means, for example a crank drive, a cam drive, an eccentric or a spindle.
  • suitable transmission means for example a crank drive, a cam drive, an eccentric or a spindle.
  • drive motor can be used in addition to a stepper motor, for example, an EC motor, a servo motor or other suitable electric drive motor use.
  • control device and the displacement drive are designed such that the travel speed of the displacement body can also be changed during a pressure stroke. This is done by changing the speed of the positive displacement drive, z. B. the speed or rotational speed of the drive motor.
  • control device is further designed such that it selects a specific driving or drive characteristic of the positive displacement for certain of the metering pump to be generated target flow rates and controls the displacement accordingly.
  • a special drive characteristic is configured such that the pressure stroke of the displacement body is started at a first increased lifting speed and then continued at a second lower lifting speed.
  • the control device is designed such that it at least for certain of the metering pump to be generated flow rates the positive displacement drive, for. B. drives a drive motor such that a pressure stroke of the displacer is started with a first increased stroke speed and then continued at the second lower stroke speed. This ensures that the check valve is closed to the suction channel in a pressure stroke for particularly low flow rates quickly and reliably, so that there no or only small leakage occurs and thus a high dosing accuracy is achieved even at low flow rates.
  • the controller After the initial pulse due to the increased lift speed, the controller then increases the lift speed by reducing the speed of the displacer drive, i. H. z. B. reduces the speed of the drive motor, so that a total of the pressure stroke only a smaller flow rate is achieved.
  • control device is designed such that it executes the above-described and subsequently described specific drive characteristic in the pressure stroke
  • control device may also be configured to additionally include the specific drive strategy described above or below in the suction stroke.
  • the control device is thus preferably designed such that it controls the displacement drive for flow rates below a predetermined limit value in such a way that a pressure stroke of the displacement body is started at a first increased lifting speed and then continued at a second lower lifting speed.
  • the exact limit may depend on the structural design of the metering and in particular the check valves used.
  • the described special driving characteristics of the displacer is to be used, according to which started with an increased lifting speed and the pressure stroke is then continued with a reduced lifting speed compared to this increased ,
  • the correspondingly specific limit values are predefined for the control device or are stored in a memory of the control device.
  • the motor can execute a predetermined number of individual steps in a certain time interval.
  • the number of individual steps per time interval can be variably set by the control device in order to change the rotational speed of the drive motor.
  • the control device is designed such that the first increased lifting speed is set faster than required for a desired flow rate. This ensures that compared to the initial rapid increase in pressure, which occur at the otherwise required for the desired flow rate lifting speed would, a faster initial pressure increase is exerted on the medium to be conveyed, which leads to a reliable closing of the valves, in particular of the valve in the suction channel. To achieve this, at the beginning of the print stroke, the stroke speed must be selected for a actually higher flow rate. Due to the later reduction in the lifting speed, this is then compensated again in order to achieve a total of a smaller volume flow over the total stroke than is achieved at the beginning of the pressure stroke with the higher stroke speed.
  • control device is designed such that the second lower stroke speed is set slower than required for a desired flow rate.
  • the control device is configured such that it selects or calculates the first increased lifting speed and the second reduced lifting speed and the duration of the partial stroke with the first lifting speed as a function of a predetermined desired flow so that an average flow rate is achieved over the entire pressure stroke is, which corresponds to the desired target flow rate.
  • the duration with which the pressure stroke is increased with increased lifting speed and the absolute values for the higher and the reduced lifting speed can be stored in the control device for certain nominal flow rates in a memory or currently for a selected target flow rate according to predetermined algorithms be calculated. Also, during the pressure stroke monitoring of the flow rate by suitable sensors possible, so that the lifting speed during the pressure stroke of the controller could be adjusted to a specific setpoint.
  • 2% or more of the total pressure stroke is performed at the first increased lift speed. More preferably, less than 20% of the total pressure stroke is performed at the first increased lift speed.
  • the hub does not have to be the maximum possible hub, it could just be a shortened hub. This is thus only a small part of the total stroke, so that the constant metering of the medium to be metered is only slightly impaired by the increased stroke speed at the beginning of the pressure stroke.
  • a higher dosing accuracy is achieved by the increased stroke speed at the beginning of the print stroke.
  • the change in the lifting speed from the first increased lifting speed to the second lower lifting speed can be sudden or else in the form of a ramp. Also, a change in several steps or stages or a ramp with changing slope is possible.
  • the first increased lift speed is more preferably equal to or greater than six strokes per minute, while the second lower lift speed is preferably less than six strokes per minute.
  • the first increased lifting speed may more preferably substantially correspond to the lifting speed in the suction stroke.
  • the first increased lifting speed is many times greater than the second lower lifting speed, preferably, the first increased lifting speed is three times, according to another preferred embodiment five times or seven times or more of the second lower stroke speed.
  • the invention further relates to a method for controlling a metering pump unit, wherein the method provides that the pressure stroke of a displacement body is carried out such that the pressure stroke is started at a first increased lifting speed and then continued at a second lower lifting speed.
  • This method is preferably used at nominal flow rates below a predetermined threshold.
  • the method is preferably designed as it results from the preceding description of the operation of the metering pump according to the invention.
  • the metering pump unit has a drive housing 2 with a pump head 4 arranged on the end side thereof.
  • a displacement drive in the form of an electric drive motor 6 is arranged, which is preferably designed as a stepper motor.
  • the drive motor 6 drives via a gear 8 to an eccentric 10.
  • the eccentric 10 By the eccentric 10, the rotating drive movement of the drive motor 6 is converted into a linear movement of a connecting rod 12.
  • the connecting rod 12 causes a lifting movement of the membrane 14 in the direction of the lifting axis X.
  • the membrane 14 defines one side of the metering chamber 16 and forms therein a displacer, through which the volume of the metering chamber 16 for pumping or metering is variable.
  • the metering chamber 16 is in communication with a suction port 18 and a pressure port 20.
  • two check valves 22 are arranged in series in the suction channel.
  • two check valves 24 are arranged in the flow path from the metering chamber 16 to the pressure port 20 in the pressure channel.
  • two check valves 22 and 24 are provided in each case. It should be understood, however, that only one check valve 22 and one check valve 24 could be used.
  • a control device or control electronics 26 is also arranged, which is connected to an operating and display device 28, via which parameters, such as the flow adjustable and information that outputs the control electronics 26, are readable.
  • a certain flow, which is adjusted for example via the control and display device 28 is converted by the control electronics 26 in a corresponding control or regulation of the drive motor 6, so that it is operated at a corresponding speed, so that the membrane 14 with a corresponding stroke speed is moved in the direction of the lifting axis X.
  • the stroke length is controllable by the control electronics 26 via the rotation angle of the drive motor 6, which is preferably designed as a stepper motor.
  • the electronic control unit 26 is designed or programmed in such a way that it uses a special drive characteristic for flow rates which are below a certain limit value stored in the control electronics 26 in order to cause the valves 22, 24 to close.
  • the corresponding limit value may depend on the characteristic, size and special design of the pump head 4 and in particular of the check valves 22 and 24.
  • the said drive characteristic is described in more detail with reference to Fig. 2 described.
  • This shows a diagram in which the engine speed n of the drive motor 6 is shown over the stroke length H of the compression stroke.
  • the point 30 in the diagram indicates the beginning of a pressure stroke, while the point 32 in the diagram indicates the end of the pressure stroke at which the full stroke length H of the diaphragm 14 in the direction of the lifting axis X is reached.
  • the pressure stroke is started at an increased rotational speed n 1 of the drive motor 6.
  • the control electronics 26 controls the drive motor 6 accordingly, so that it runs at this speed. Due to the transmission 8 and the eccentric 10, this causes a corresponding, proportional first increased lifting speed of the diaphragm 14 in the compression stroke.
  • the increased stroke speed due to the increased speed n 1 causes at the beginning of the stroke a pulse or rapid increase in pressure on the fluid in the metering chamber 16, ie an increased pressure, which causes a dense, reliable closing of the suction-side check valve 22.
  • the increased speed n 1 is maintained for a predetermined time, which corresponds to a corresponding stroke length to the point 34 of the pressure stroke.
  • the pressure stroke is continued at a reduced speed n 2 of the drive motor 6.
  • This reduced speed n 2 thus corresponds to a reduced lifting speed of the diaphragm 14 caused by the transmission 8 and the eccentric 10.
  • This reduced speed n 2 or reduced lifting speed is maintained until the end of the pressure stroke 32.
  • This reduced speed n 2 which is proportional to a reduced lifting speed of the diaphragm 14, is predetermined by appropriate control of the drive motor 6 of the control electronics 26.
  • the control electronics 26 selects the speeds n 1 and n 2 in dependence on a predetermined target speed n s .
  • This setpoint speed n s is proportional to a setpoint lifting speed, which in turn is proportional to a desired delivery flow, which is predetermined, for example, by input to the operating and display device 28.
  • the proportional setpoint rotational speeds with which the drive motor 6 must be driven be stored or calculated by the control electronics 26 in a memory for corresponding desired flow rates.
  • n 1 which is proportional to an increased first stroke speed
  • n 2 which is proportional to a second lower lifting speed of the membrane 14th is, as well as the duration of the partial stroke with the increased speed n 1 stored.
  • these speeds n 1 and n 2 can also be calculated on the basis of algorithms stored in the control electronics 26.
  • the stroke length 34 or duration in which the diaphragm 14 is operated at the first increased lifting speed or the drive motor 6 at the first increased rotational speed n 1 , the height of the first rotational speed n 1 and the height of the second rotational speed n 2 , which correspond to a first increased lifting speed and a second lower lifting speed of the diaphragm 14, are adjusted by the control electronics 26 so that over the entire stroke length 32 on average the desired nominal flow rate to which the desired Speed n s of the motor 6 corresponds, is reached.
  • the amount remains constant with respect to a dosage with a constant stroke speed proportional to the target speed n s .
  • the stroke length 34 which takes place at the increased stroke speed, ie at the increased rotational speed n 1 , preferably small or short in comparison with the length of the total stroke 32, so that only a very short time at the beginning of the stroke, an increased flow occurs,
  • the point 34 preferably corresponds to between 2 and 20% of the total pressure stroke 32.

Claims (11)

  1. Groupe pompe doseuse comprenant une chambre de dosage (16), un corps de déplacement (14) disposé adjacent à cette chambre, qui peut être mis en mouvement par un entraînement de déplacement (6), ainsi qu'un dispositif de commande (26) pour le pilotage de l'entraînement de déplacement (6),
    caractérisé en ce que le dispositif de commande (26) est conçu de telle sorte qu'au moins pour certains débits de consigne qui doivent être générés par la pompe doseuse, il pilote l'entraînement de déplacement (6) de façon telle qu'une course de pression du corps de déplacement (14) soit commencée à une première vitesse de course plus élevée (n1) et poursuivie ensuite à une seconde vitesse de course plus faible (n2).
  2. Groupe pompe doseuse selon la revendication 1, caractérisé en ce que le dispositif de commande (26) est conçu de façon telle que, pour des débits inférieurs à une limite prédéterminée, il pilote l'entraînement de déplacement (6) de façon à ce qu'une course de pression du corps de déplacement (14) soit commencée à une première vitesse de course plus élevée (n1) et poursuivie ensuite à une seconde vitesse de course plus faible (n2).
  3. Groupe pompe doseuse selon l'une des revendications précédentes, caractérisé en ce que, pour faire varier la vitesse de course, l'entraînement de déplacement (6) peut être mis en action à différents régimes (n) ou à différentes vitesses par un pilotage correspondant du dispositif de commande (26).
  4. Groupe pompe doseuse selon l'une des revendications précédentes, caractérisé en ce que l'entraînement de déplacement (6) est un moteur pas-à-pas.
  5. Groupe pompe doseuse selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (26) est conçu de telle sorte que la première vitesse de course plus élevée (n1) est réglée plus rapide que celle nécessaire pour un débit de consigne.
  6. Groupe pompe doseuse selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (26) est conçu de telle sorte que la seconde vitesse de course plus faible (n2) est réglée plus lente que celle nécessaire pour un débit de consigne.
  7. Groupe pompe doseuse selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (26) est conçu de telle sorte que la première vitesse de course (n1) et la seconde vitesse de course (n2) ainsi que la durée (34) de la course partielle exécutée à la première vitesse de course (n1) sont réglées par le dispositif de commande (26) de façon à atteindre, sur la course de pression complète (32), un débit moyen qui correspond à un débit de consigne.
  8. Groupe pompe doseuse selon l'une des revendications précédentes, caractérisé en ce que 2 % ou plus de la course complète sont effectués à la première vitesse de course plus élevée (n1).
  9. Groupe pompe doseuse selon l'une des revendications précédentes, caractérisé en ce que moins de 20 % de la course de pression complète sont effectués à la première vitesse de course plus élevée (n1).
  10. Procédé de commande d'un groupe pompe doseuse, caractérisé en ce que la course de pression d'un corps de déplacement (14) est effectuée de façon telle que la course de pression est commencée à une première vitesse de course plus élevée (n1) et est poursuivie ensuite à une deuxième vitesse de course plus faible (n2).
  11. Procédé selon la revendication 10, caractérisé en ce que le procédé est appliqué dans le cas de débits de consigne inférieurs à une limite prédéterminée.
EP10001643.5A 2010-02-18 2010-02-18 Agrégat de pompes de dosage et procédé de commande d'un agrégat de pompes de dosage Active EP2362100B2 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP10001643.5A EP2362100B2 (fr) 2010-02-18 2010-02-18 Agrégat de pompes de dosage et procédé de commande d'un agrégat de pompes de dosage
CN201180009714.3A CN102762860B (zh) 2010-02-18 2011-02-16 计量泵机组以及控制计量泵机组的方法
US13/579,719 US10054117B2 (en) 2010-02-18 2011-02-16 Dosing pump unit and method for controlling a dosing pump unit
JP2012553215A JP5902101B2 (ja) 2010-02-18 2011-02-16 定量ポンプ装置及び定量ポンプ装置の制御方法
PCT/EP2011/000722 WO2011101119A1 (fr) 2010-02-18 2011-02-16 Groupe motopompe de dosage et procédé pour commander un groupe motopompe de dosage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10001643.5A EP2362100B2 (fr) 2010-02-18 2010-02-18 Agrégat de pompes de dosage et procédé de commande d'un agrégat de pompes de dosage

Publications (3)

Publication Number Publication Date
EP2362100A1 EP2362100A1 (fr) 2011-08-31
EP2362100B1 true EP2362100B1 (fr) 2013-10-09
EP2362100B2 EP2362100B2 (fr) 2020-07-08

Family

ID=42167593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10001643.5A Active EP2362100B2 (fr) 2010-02-18 2010-02-18 Agrégat de pompes de dosage et procédé de commande d'un agrégat de pompes de dosage

Country Status (5)

Country Link
US (1) US10054117B2 (fr)
EP (1) EP2362100B2 (fr)
JP (1) JP5902101B2 (fr)
CN (1) CN102762860B (fr)
WO (1) WO2011101119A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11480163B2 (en) 2018-08-27 2022-10-25 Saudi Arabian Oil Company Pumping system with control features for controlling stroke duration and injection volume

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US4131393A (en) 1977-01-21 1978-12-26 Altex Scientific, Inc. Fluid pump mechanism
US4359312A (en) * 1978-08-15 1982-11-16 Zumtobel Kg Reciprocating pump for the pulsation-free delivery of a liquid
US4255088A (en) * 1979-06-14 1981-03-10 Valleylab, Inc. Liquid pumping system having means for detecting gas in the pump
US4396385A (en) * 1980-12-05 1983-08-02 Baxter Travenol Laboratories, Inc. Flow metering apparatus for a fluid infusion system
US4474309A (en) * 1981-10-22 1984-10-02 Oximetrix, Inc. Stepping motor control procedure for achieving variable rate, quasi-continuous fluid infusion
US4470758A (en) * 1981-11-12 1984-09-11 Oximetrix, Inc. Intravenous fluid pump monitor
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US4681513A (en) * 1985-02-01 1987-07-21 Jeol Ltd. Two-stage pump assembly
DE3546189A1 (de) * 1985-12-27 1987-07-02 Ott Kg Lewa Verfahren und vorrichtung zur durchflussmessung bei oszillierenden verdraengerpumpen
DE3801157A1 (de) * 1988-01-16 1989-08-03 Hagen W Dieter Elektronisch gesteuerte kolbendosierpumpe bzw. maschine
US5056036A (en) * 1989-10-20 1991-10-08 Pulsafeeder, Inc. Computer controlled metering pump
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JPH0868379A (ja) * 1994-08-29 1996-03-12 Oriental Motor Co Ltd リニアパルスモータを備えた往復形ポンプ
DE19525557A1 (de) * 1995-07-13 1997-01-16 Knf Flodos Ag Dosierpumpe
JP3822362B2 (ja) * 1998-07-10 2006-09-20 株式会社スギノマシン 液体加圧装置
SE519091C2 (sv) 2000-05-03 2003-01-14 Aga Ab Anordning och förfarande för pumpning av flytande gas, pumpsystem för pumpning av flytande gas samt system och förfarande för cyklisk framställning av polymerprodukter
DE10162773A1 (de) * 2001-12-20 2003-07-10 Knf Flodos Ag Sursee Dosierpumpe
DE202005013090U1 (de) 2005-08-19 2007-01-04 Prominent Dosiertechnik Gmbh Motordosierpumpe
DE102005039772A1 (de) * 2005-08-22 2007-03-08 Prominent Dosiertechnik Gmbh Magnetdosierpumpe

Also Published As

Publication number Publication date
US20130202454A1 (en) 2013-08-08
JP5902101B2 (ja) 2016-04-13
CN102762860A (zh) 2012-10-31
EP2362100A1 (fr) 2011-08-31
US10054117B2 (en) 2018-08-21
WO2011101119A1 (fr) 2011-08-25
CN102762860B (zh) 2015-12-16
EP2362100B2 (fr) 2020-07-08
JP2013519830A (ja) 2013-05-30

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